"Iran is planning to stop using the US dollar to price oil, with less than half of its oil income now paid in the US currency, Iran's central bank governor said...

...almost all of Iran's European clients and some of its Asian customers have accepted making payments in non-dollar currencies."

http://www.jpost.com/servlet/Satellite?cid=1173879194960&pagename=JPost%2FJPArticle%2FShowFull

The article also states that Iran is the world's 4th largest oil producer. Somebody please tell me that the U.S. and Britain are prepared for this and that it won't effect the economy.